INCI · other · CIR review pending · used in 14 products
Water/Aqua/Eau
Water (H2O) is the most common cosmetic ingredient, typically appearing first on ingredient lists, indicating it is the largest component by volume. It primarily functions as a solvent for water-soluble ingredients. The water used in cosmetics is purified and deionized, meaning nearly all mineral ions are removed to improve product stability over time.
Evidence level
strongEWG score
—Comedogenic
—Category
other● Benefits
Water acts as a solvent to dissolve and carry other ingredients in a formulation. Once absorbed into the skin, it contributes to hydration from within; however, applying pure water topically can be drying rather than hydrating.
hydrating
● Cautions
Applying pure water directly to skin (e.g., prolonged baths) can be drying rather than hydrating.
